Guidable intravascular blood pump and related methods
First Claim
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1. An intravascular blood pump system, comprising:
- a blood pump comprising a rotor having a rotor hub, at least one blade extending outward from the rotor hub, and a shroud within which the rotor is at least partially rotatably disposed;
a catheter coupled to the blood pump;
a cannula that is coupled to the blood pump;
one or more first ports and one or more second ports establishing fluid communication between a lumen of the cannula and an exterior region of the cannula, wherein at least one first port of the one or more first ports is located in proximity to the rotor and at least one second port of the one or more second ports is spaced apart from and located distal to the at least one first port, wherein the cannula is configured such that when the blood pump is positioned in the patient to provide left-heart support a distal end of the cannula and the at least one second port are positioned inside the patient'"'"'s heart and a proximal end of the cannula and the at least one first port are positioned in the patient'"'"'s aorta, and the blood pump is configured to draw blood from the patient'"'"'s heart into the at least one second port through the cannula lumen and out the at least one first port to provide left-heart support while the cannula is positioned across an aortic valve of the patient; and
a distal tip, wherein the distal tip is pigtail shaped or J-shaped, and when the blood pump is positioned in the patient to provide left-heart support the distal tip is wholly within a left ventricle of the patient.
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Abstract
An improved intravascular blood pump and related methods involving the broad inventive concept of equipping the intravascular blood pump with guiding features such that the intravascular blood pump can be selectively positioned at a predetermined location within the circulatory system of a patient.
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Citations
30 Claims
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1. An intravascular blood pump system, comprising:
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a blood pump comprising a rotor having a rotor hub, at least one blade extending outward from the rotor hub, and a shroud within which the rotor is at least partially rotatably disposed; a catheter coupled to the blood pump; a cannula that is coupled to the blood pump; one or more first ports and one or more second ports establishing fluid communication between a lumen of the cannula and an exterior region of the cannula, wherein at least one first port of the one or more first ports is located in proximity to the rotor and at least one second port of the one or more second ports is spaced apart from and located distal to the at least one first port, wherein the cannula is configured such that when the blood pump is positioned in the patient to provide left-heart support a distal end of the cannula and the at least one second port are positioned inside the patient'"'"'s heart and a proximal end of the cannula and the at least one first port are positioned in the patient'"'"'s aorta, and the blood pump is configured to draw blood from the patient'"'"'s heart into the at least one second port through the cannula lumen and out the at least one first port to provide left-heart support while the cannula is positioned across an aortic valve of the patient; and a distal tip, wherein the distal tip is pigtail shaped or J-shaped, and when the blood pump is positioned in the patient to provide left-heart support the distal tip is wholly within a left ventricle of the patient. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An intravascular blood pump system, comprising:
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a blood pump adapted to be guided to a predetermined location within a circulatory system of a patient by a guide wire and configured to provide left-heart support, the blood pump comprising a rotor having a rotor hub and at least one blade extending outward from the rotor hub, and a shroud within which the rotor is at least partially rotatably disposed; a catheter coupled to the blood pump; a cannula that is coupled to the blood pump, one or more first ports and one or more second ports establishing fluid communication between a lumen of the cannula and an exterior region of the cannula, wherein at least one first port is located in proximity to the rotor and at least one second port is spaced apart from and located distal to the at least one first port, wherein the cannula is configured such that when the blood pump is positioned in the patient to provide left-heart support a distal end of the cannula and the at least one second port are positioned inside the patient'"'"'s heart and a proximal end of the cannula and the at least one first port are positioned in the patient'"'"'s aorta, and the blood pump is configured to draw blood from the patient'"'"'s heart into the at least one second port through the cannula lumen and out the at least one first port to provide left-heart support while the cannula is positioned across an aortic valve of the patient; and a pressure sensing element configured to sense pressure proximate the intravascular blood pump, wherein the pressure sensing element comprises at least one of a piezo-electric pressure sensing element and a strain gauge, wherein a distal portion of the shroud has an outer diameter matching an inner diameter of a proximal portion of the cannula, and the proximal portion of the cannula is disposed about a distal end portion of the shroud, and wherein at least a proximal portion of the shroud has the same outer diameter as the proximal portion of the cannula. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16)
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17. An intravascular blood pump system, comprising:
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a blood pump adapted to be guided to a predetermined location within a circulatory system of a patient by a guide wire and configured to provide left-heart support, the blood pump comprising a rotor having a rotor hub and a shroud at least partially disposed about the rotor hub, and at least one blade extending outward from the rotor hub; a catheter coupled to the blood pump; a cannula coupled to the blood pump, wherein one or more first ports and one or more second ports are in fluid communication between a lumen of the cannula and an exterior region of the cannula, wherein at least one first port of the one or more first ports is located in proximity to the rotor and at least one second port of the one or more second ports is spaced apart from and located distal to the at least one first port, and the cannula is configured such that when the blood pump is positioned in the patient to provide left-heart support a distal end of the cannula and the at least one second port are positioned inside the patient'"'"'s heart and a proximal end of the cannula and the at least one first port are positioned in the patient'"'"'s aorta, and the blood pump is configured to draw blood from the patient'"'"'s heart into the at least one second port through the cannula lumen and out the at least one first port to provide left-heart support while the cannula is positioned across an aortic valve of the patient; a pressure sensing element configured to sense pressure proximate the blood pump; and a distal tip, wherein the distal tip is pigtail shaped or J-shaped, and when the blood pump is positioned in the patient to provide left-heart support the distal tip is wholly within a left ventricle of the patient. - View Dependent Claims (18, 19, 20, 21, 22, 23)
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24. An intravascular blood pump system, comprising:
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a blood pump adapted to be guided to a predetermined location within a circulatory system of a patient by a guide wire and configured to provide left-heart support, the blood pump comprising a rotor having a rotor hub and a rotor shroud at least partially disposed about the rotor hub, and at least one blade extending outward from the rotor hub; a catheter coupled to the blood pump; a cannula coupled to the blood pump, a distal portion of the rotor shroud having an outer diameter matching an inner diameter of a proximal portion of the cannula, the proximal portion of the cannula disposed about a distal portion of the rotor shroud, and at least a proximal portion of the rotor shroud has the same outer diameter as the proximal portion of the cannula, one or more first ports and one or more second ports establishing fluid communication between a lumen of the cannula and an exterior region of the cannula, wherein at least one first port of the one or more first ports is located in proximity to the rotor and at least one second port of the one or more second ports is spaced apart from and located distal to the at least one first port, wherein the cannula is configured such that when the blood pump is positioned in the patient to provide left-heart support a distal end of the cannula and the at least one second port are positioned inside the patient'"'"'s heart and a proximal end of the cannula lumen and the at least one first port are positioned in the patient'"'"'s aorta, wherein the intravascular blood pump is configured to draw blood from the patient'"'"'s heart into the at least one second port through the cannula and out the at least one first port to provide left-heart support while the cannula is positioned across an aortic valve of the patient, wherein the guide wire does not pass through the rotor hub or the catheter; a pigtail shaped distal tip or a J-shaped distal tip, wherein when the intravascular blood pump is positioned in the patient to provide left-heart support the pigtail shaped distal tip or the J-shaped distal tip is wholly within a left ventricle of the patient; and a pressure sensing element configured to sense pressure proximate the intravascular blood pump comprising a fluid column extending through the catheter. - View Dependent Claims (25, 26, 27, 28, 29, 30)
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Specification